X-51A built by U.S. which was designed to travel from London to New York (around 5570 km) in 45 minutes crashed into the Pacific Ocean in its test flight. The test was conducted off the coast of California at Mach 6 speed– (up to 7,300 kmph) which means six times the speed of sound.
What is X-51A?
- It is an unmanned U.S. military jet specially designed to fly at hypersonic speeds.